Swift
xxxxxxxxxxfunc isValidEmailAddress(emailAddressString: String) -> Bool { var returnValue = true let emailRegEx = "[A-Z0-9a-z.-_]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,3}" do { let regex = try NSRegularExpression(pattern: emailRegEx) let nsString = emailAddressString as NSString let results = regex.matches(in: emailAddressString, range: NSRange(location: 0, length: nsString.length)) if results.count == 0 { returnValue = false } } catch let error as NSError { print("invalid regex: \(error.localizedDescription)") returnValue = false } return returnValue}
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